动词不定式是英语语法中的一种重要结构，由“to + 动词原形”构成，可以在句子中充当名词、形容词或副词。例如，"我希望学好英语，以便去国外留学"，"我们约定明天早上在图书馆见面"，"她决定留在家里，以便照顾孩子"等。
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我希望学好英语，以便去国外留学。 I hope to learn English well so that I can study abroad.
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我们约定明天早上在图书馆见面。 We agreed to meet at the library tomorrow morning.
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她喜欢跑步，每天早上都去公园跑步。 She likes to run, and goes to the park for a run every morning.
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我忘记了买咖啡，于是我又回去了一趟。 I forgot to buy coffee, so I went back again.
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他不会开车，所以他坐公交车上班。 He doesn't know how to drive, so he takes the bus to work.
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我喜欢在周末早上起床后去慢跑。 I like to go for a jog after getting up on weekend mornings.
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我们计划在晚饭后去看电影。 We plan to go to the movies after dinner.
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学生们努力学习，以便考试取得好成绩。 The students work hard to get good grades on the exam.
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她决定留在家里，以便照顾孩子。 She decided to stay at home to take care of her children.
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他想学习中文，因为他想去中国旅游。 He wants to learn Chinese because he wants to travel to China.
